Lin has 4 pinecones and some acorns. She has 7 fewer pinecones than acorns. How many acorns does lin have?

Let's represent the number of acorns Lin has as A. Since Lin has 7 fewer pinecones than acorns, we can express the number of pinecones she has as A-7. Given that Lin has 4 pinecones in total, we can set up the equation A-7 + 4 = A. Solving this equation, we find that Lin has 11 acorns.